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docs.datacontroller.io/docs/tables/mpe_validations.md
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---
layout: article
title: MPE_VALIDATIONS
description: The `MPE_VALIDATIONS` table enables a number of validations to be applied to the data at the point of entry - such as casing, min/max values, nullability, and the ability to generate dropdown values directly from source tables or dynamically from SAS programs.
og_image: /img/mpe_validations.png
---
# MPE_VALIDATIONS
The `MPE_VALIDATIONS` table enables a number of validations to be applied to the data at the point of entry - such as casing, min/max values, nullability, and the ability to generate dropdown values directly from source tables or dynamically from SAS programs.
A detailed breakdown is available in the [validations](/dcc-validations/) section.
![validations](/img/mpe_validations.png)
## Columns
- 🔑`TX_FROM num`: SCD2 open datetime
- `TX_TO num`: SCD2 close datetime
- 🔑 `BASE_LIB char(8)`: SAS Libref (8 chars)
- 🔑 `BASE_DS char(32)`: The library member name
- 🔑 `BASE_COL char(32)`: The column name
- 🔑 `RULE_TYPE char(32)`: The name of the rule to apply. Valid values include `CASE`, `NOTNULL`, `MINVAL`, `MAXVAL`, `READONLY`, `HIDDEN`, `ROUND`, `NUMBER_FORMAT`, `HARDFORMULA`, `SOFTFORMULA`, `HARDREGEX`, `SOFTREGEX`, `HARDSELECT`, `SOFTSELECT`, `HARDSELECT_HOOK` and `SOFTSELECT_HOOK`.
- `RULE_VALUE char(128)`: The value of the rule.
- `RULE_ACTIVE num`: Set to 1 for an active rule, or 0 to disable the rule.